CN113828620A - Three-sludge recovery system and recovery method - Google Patents
Three-sludge recovery system and recovery method Download PDFInfo
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- CN113828620A CN113828620A CN202111113793.4A CN202111113793A CN113828620A CN 113828620 A CN113828620 A CN 113828620A CN 202111113793 A CN202111113793 A CN 202111113793A CN 113828620 A CN113828620 A CN 113828620A
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- 238000011084 recovery Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000010802 sludge Substances 0.000 title claims description 50
- 238000012216 screening Methods 0.000 claims abstract description 176
- 230000007246 mechanism Effects 0.000 claims abstract description 163
- 239000002245 particle Substances 0.000 claims abstract description 145
- 235000019738 Limestone Nutrition 0.000 claims abstract description 63
- 239000006028 limestone Substances 0.000 claims abstract description 63
- 239000002006 petroleum coke Substances 0.000 claims abstract description 45
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims description 57
- 239000004575 stone Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 13
- 238000002485 combustion reaction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a three-mud recovery system and a recovery method, wherein the system is characterized in that screening mechanisms are respectively arranged in a three-mud pretreatment unit, a petroleum coke pretreatment unit and a limestone pretreatment unit, and broken particles are classified by utilizing a multi-stage roller structure in the screening mechanisms, so that the particles with uniform particle size and preset particle size are stirred according to the volume proportion, and the particles can reach the conditions required by combustion of a CFB (circulating fluidized bed) boiler, thereby recovering and comprehensively utilizing the three-mud, not only reducing the stacking time of solid wastes, but also reducing the pollution of a three-mud stacking area to the environment and saving the cost; because the particle size of raw materials is unified, different raw materials mix in the stirring process, can not produce the layering phenomenon, make the mixed effect more abundant, when getting into the burning in the CFB boiler, it is more abundant to burn, has improved combustion efficiency.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and relates to a three-sludge recovery system and a recovery method.
Background
The three-mud is generally a general name of activated sludge, oil sludge and tank scum generated in a sewage treatment plant, and the three-mud contains a large amount of mineral oil, sulfide and other toxic substances and belongs to dangerous waste, and at present, the main treatment modes of the three-mud are as follows: the blending combustion method, the separation method, the biodegradation method, the reinjection method, the burying method, the stacking method and the like, wherein the biodegradation method, the reinjection method, the burying method, the stacking method and the like have huge treatment cost, increase the stacking time of solid wastes, cause the environmental pollution of a stacking area of the three-mud, moreover, the three kinds of mud contain toxic substances, can pollute soil, surface water and underground water, cannot radically solve environmental pollution, the additional equipment required in the separation method has higher cost and general treatment effect, cannot be popularized in a large range, the blending burning method can effectively destroy toxic and harmful substances and organic wastes in wastes, is the most rapid and effective technology for realizing reduction and harmlessness of industrial dangerous substances, is widely adopted in European and American countries, it is widely researched and applied by the characteristics of high processing speed, high decrement degree, energy recycling and the like.
Chinese patent document CN107935337A discloses a three-mud recovery system and a recovery process thereof, wherein the three-mud recovery system includes: the device comprises a three-mud pretreatment unit, a petroleum coke pretreatment unit, a limestone pretreatment unit, a stirrer and a discharging part, wherein the three-mud pretreatment unit comprises a filtering device and an oil weighing device which are sequentially connected, the petroleum coke pretreatment unit comprises a first crusher and an aggregate batching device which are sequentially connected, and the limestone pretreatment unit comprises a second crusher, a cement bin and a cement batching device which are sequentially connected; in the process of recycling the three-mud, the three-mud is filtered and metered in a three-mud pretreatment unit and then input into a stirrer, petroleum coke and limestone are respectively stirred and metered and then input into the stirrer, and the three raw materials mixed according to a certain proportion are finally stirred in the stirrer, so that the three-mud can reach the conditions required by combustion of a CFB boiler, and the three-mud is recycled and comprehensively utilized.
Disclosure of Invention
Aiming at the problems in the prior art, the invention discloses a three-sludge recovery system and a recovery method, wherein three sludge, limestone and petroleum coke are uniformly screened according to a preset particle size, and the screened particles are stirred and mixed according to a certain proportion for recovery, so that the conditions required by combustion of a CFB boiler can be met, the three sludge can be recovered and comprehensively utilized, and meanwhile, the particles with overlarge particle size can be crushed again for recovery and utilization, and the utilization efficiency of raw materials is fully improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a three-sludge recovery system comprises three sludge pretreatment units, a petroleum coke pretreatment unit, a limestone pretreatment unit, a stirring mechanism and a discharging mechanism, wherein the three sludge pretreatment units, the petroleum coke pretreatment unit and the limestone pretreatment unit are respectively connected with an inlet of the stirring mechanism, an inlet of the stirring mechanism is connected with an outlet of the stirring mechanism, the three sludge pretreatment units, the petroleum coke pretreatment unit and the limestone pretreatment unit are respectively provided with a crushing mechanism and a screening mechanism, an outlet of the crushing mechanism is connected with an inlet of the screening mechanism,
the screening mechanism comprises a rack, a machine shell, a first screening roller, a second screening roller, a guide roller, a feeding part, a first discharging part, a second discharging part and a third discharging part, wherein the machine shell is fixed on the rack, the first screening roller and the second screening roller are arranged in the machine shell, the first screening roller is coaxially arranged in the second screening roller, the second screening roller is fixed along the axial direction of the first screening roller, and the second screening roller freely rotates along the tangential direction of the first screening roller; the first screening roller is provided with a feeding hole and a discharging hole, wherein the feeding part is communicated with the feeding hole of the first screening roller; the first discharging part is arranged on one side of a discharging port of the first screening roller and fixedly connected with the machine shell, the second discharging part is arranged at the lower part of the machine shell and close to one side of the discharging port of the second screening roller, and the third discharging part is arranged at the bottom of the machine shell; the guide roller is arranged between the first screening roller and the second screening roller and is fixedly connected with the first screening roller; and the surfaces of the first screening roller and the second screening roller are provided with screen holes.
Furthermore, the first screening roller and the second screening roller have opposite rotating directions, a first spiral material guide groove is formed in the inner surface of the first screening roller, a second spiral material guide groove is formed in the inner surface of the second screening roller, and the rotating directions of the first spiral material guide groove and the second spiral material guide groove are opposite.
Furthermore, the feeding part comprises a feeding hopper, a feeding channel, a feeding motor and a screw conveyor, one end of the feeding channel extends into the shell to be embedded with the feeding hole of the first screening roller, the other end of the feeding channel is connected with the feeding motor, the feeding hopper is positioned above the feeding channel, and the bottom of the feeding hopper is communicated with the feeding channel; the spiral conveyor is internally provided with spiral blades, one end of a middle shaft of each spiral blade is connected with a driving shaft of the feeding motor, and the other end of the middle shaft is fixedly connected with a feeding hole of the first screening roller.
Further, the guide roller is of a conical structure, and the opening direction of the guide roller faces to one side of the discharge hole of the first screening roller; the end, with a larger opening, of the guide roller is provided with a plurality of connecting rods, and the guide roller is fixedly connected with the outer surface of the first screening roller through the connecting rods; the smaller end of the upper opening of the guide roller is matched with the outer surface of the feeding channel, and the smaller end of the upper opening of the guide roller and the feeding channel keep tangential free rotation.
Further, third ejection of compact portion is including going out hopper and storage case, go out the hopper and be located the bottom of casing, and go out the inside cavity intercommunication of hopper and casing, the storage case is located the below of hopper, just the storage incasement portion communicates with going out the hopper, the storage case lower part is equipped with the negative pressure export, negative pressure export intercommunication has negative pressure feeding device, negative pressure feeding device is used for carrying and separates the object in the storage case.
Further, the three-sludge pretreatment unit comprises a filtering and concentrating device, a drying mechanism, a first crushing mechanism and a first metering device, wherein an outlet of the filtering and concentrating device is connected with an inlet of the drying mechanism, an outlet of the drying mechanism is connected with an inlet of the first crushing mechanism, an outlet of the first crushing mechanism is connected with an inlet of a screening mechanism in the three-sludge pretreatment unit, an outlet of the screening mechanism in the three-sludge pretreatment unit is connected with an inlet of the first metering device, and an outlet of the first metering device is connected with the stirring mechanism; the petroleum coke pretreatment unit comprises a second crushing mechanism and a second metering mechanism, an outlet of the second crushing mechanism is connected with an inlet of a screening mechanism in the petroleum coke pretreatment unit, an outlet of the screening mechanism in the petroleum coke pretreatment unit is connected with an inlet of a second metering device, and an outlet of the second metering device is connected with the stirring mechanism; the lime stone is characterized in that the lime stone pretreatment unit comprises a third crushing mechanism and a third metering mechanism, an outlet of the third crushing mechanism is connected with an inlet of a screening mechanism in the lime stone pretreatment unit, an outlet of the screening mechanism in the lime stone pretreatment unit is connected with an inlet of a third metering device, and an outlet of the third metering device is connected with the stirring mechanism.
Further, the invention also discloses a three-sludge recovery method based on the three-sludge recovery system, which comprises the following specific steps:
firstly, sequentially filtering, concentrating and drying the three-mud through a three-mud pretreatment unit, conveying the three-mud to a first crushing mechanism to crush the three-mud into three-mud particles, conveying the three-mud particles into a screening mechanism to screen out the three-mud particles meeting the preset particle size, and introducing the three-mud particles meeting the preset particle size into a first metering device through a second discharging part;
after the petroleum coke is broken into stone tar particles by the second breaking mechanism, the stone tar particles are sent into a screening mechanism, the stone tar particles which accord with the preset particle size are screened out, and the stone tar particles which accord with the preset particle size are introduced into a second metering device through a second discharging part;
after the limestone is crushed into limestone particles by the third crushing mechanism, the limestone particles are fed into the screening mechanism, limestone particles which accord with the preset particle size are screened out, and the limestone particles which accord with the preset particle size are introduced into the third metering device through the second discharging part;
the first metering device, the second metering device and the third metering device are respectively three mud according to the volume ratio: limestone: stirring and mixing the three-mud, the limestone and the petroleum coke in a stirring mechanism, wherein the ratio of the petroleum coke to the petroleum coke is 1:10: 1;
and inputting the mixture into the discharging mechanism for storage after stirring is finished, and finishing the recovery of the three-mud.
Further, in the process of screening three mud particles by the screening mechanism in the three mud pretreatment units, the three mud particles larger than the preset particle size are conveyed to the first crushing mechanism through the first discharge port of the screening mechanism to be crushed again, and the three mud particles smaller than the preset particle size are introduced into the storage box through the third discharge portion of the screening mechanism.
Further, among the petroleum coke pretreatment unit, the screening mechanism screens the petroleum coke granule in-process, the stone tar granule that is greater than preset particle size is carried to the broken mechanism of second through the first discharge gate of screening mechanism and is broken again, and the stone tar granule that is less than preset particle size lets in the storage case through the third discharge portion of screening mechanism.
Further, in the limestone particle screening process of the screening mechanism in the limestone pretreatment unit, limestone particles larger than the preset particle size are conveyed to the third crushing mechanism through the first discharge port of the screening mechanism to be crushed again, and limestone particles smaller than the preset particle size are introduced into the storage box through the third discharge portion of the screening mechanism.
Compared with the prior art, the invention has the following advantages:
1) according to the three-mud recovery system, the screening mechanisms are respectively arranged in the three-mud pretreatment unit, the petroleum coke pretreatment unit and the limestone pretreatment unit, the broken particles are classified by utilizing a multi-stage roller structure in the screening mechanisms, and the particles which have uniform particle sizes and meet the preset particle sizes are stirred according to the volume proportion, so that the particles can reach the conditions required by combustion of a CFB boiler, the three-mud is recovered and comprehensively utilized, the stacking time of solid wastes is reduced, the pollution of a three-mud stacking area to the environment is reduced, and the cost can be saved; because the particle size of raw materials is unified, different raw materials mix in the stirring process, can not produce the layering phenomenon, make the mixed effect more abundant, when getting into the burning in the CFB boiler, it is more abundant to burn, has improved combustion efficiency.
2) The screening mechanisms in the three-sludge pretreatment unit, the petroleum coke pretreatment unit and the limestone pretreatment unit in the three-sludge recovery system respectively classify the crushed raw material particles according to the particle size, the particles larger than the preset particle size can be recovered to the corresponding crushing mechanism to be crushed again, the particles smaller than the particle size are uniformly stored and then continuously introduced into a circulating air duct of a fluidized bed boiler to be combusted, and the particles with small particle size can be driven to flow by circulating gas in the fluidized bed boiler due to the small particle size, so that the combustion efficiency is further enhanced.
Drawings
FIG. 1 is a schematic structural diagram of a three-sludge recovery system in the present embodiment;
fig. 2 is a schematic structural view of the screening mechanism in this embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example (b):
as shown in fig. 1-2, the present embodiment first discloses a three-sludge recycling system, which includes a three-sludge pretreatment unit, a petroleum coke pretreatment unit, a limestone pretreatment unit, a stirring mechanism 10, and a discharging mechanism 11, wherein the three-sludge pretreatment unit, the petroleum coke pretreatment unit, and the limestone pretreatment unit are respectively connected to an inlet of the stirring mechanism 10, an inlet of the stirring mechanism 10 is connected to an outlet of the stirring mechanism 10, the three-sludge pretreatment unit, the petroleum coke pretreatment unit, and the limestone pretreatment unit are respectively provided with a crushing mechanism and a screening mechanism, and an outlet of the crushing mechanism is connected to an inlet of the screening mechanism.
Specifically, in this embodiment, the three sludge pretreatment units, the petroleum coke pretreatment unit, and the limestone pretreatment unit are all provided with screening mechanisms, which are mainly used for classifying and screening crushed raw material particles, specifically, the three sludge pretreatment units are provided with a first screening mechanism 4a, the petroleum coke pretreatment units are provided with a second screening mechanism 4b, and the limestone pretreatment units are provided with a third screening mechanism 4c, the screening mechanisms include a rack 401, a housing 402, a first screening roller 403, a second screening roller 404, a guide roller 405, a feeding portion 406, a first discharging portion 407, a second discharging portion 408, and a third discharging portion 409, wherein the housing 402 is fixed on the rack 401, the first screening roller 403 and the second screening roller 404 are arranged in the housing 402, the first screening roller 403 is coaxially arranged inside the second screening roller 404, the second screening roller 404 is kept fixed along the axial direction of the first screening roller 403, the second screen cylinder 404 is free to rotate in the tangential direction of the first screen cylinder 403; the first screening roller 403 is provided with a feeding hole and a discharging hole, wherein the feeding part 406 is communicated with the feeding hole of the first screening roller 403; the first discharging part 407 is arranged on one side of the discharging port of the first screening roller 403, the first discharging part 407 is fixedly connected with the casing 402, the second discharging part 408 is arranged on the lower part of the casing 402, the second discharging part 408 is close to one side of the discharging port of the second screening roller 404, and the third discharging part 409 is arranged at the bottom of the casing 402; the guide roller 405 is arranged between the first screening roller 403 and the second screening roller 404, and the guide roller 405 is fixedly connected with the first screening roller 403; the surfaces of the first screening roller 403 and the second screening roller 404 are both provided with screen holes, in this embodiment, the screen hole diameter of the first screening roller 403 is larger than that of the second screening roller 404, the first screening roller 403 primarily screens particles meeting a preset particle size, and all the screened particles are particles or powder smaller than the preset particle size, in order to further avoid stratification in the stirring process, the second roller secondarily screens the particles or powder smaller than the preset particle size, so that the raw material in the final stirring mechanism 10 is kept at a uniform particle size, and the stirring stratification is avoided, meanwhile, based on the structural characteristics of the existing CFB boiler, a fluidized combustion mode is adopted, the main structure includes two parts, namely a combustion chamber (including a dense phase region and a dilute phase region) and a circulating return furnace (including a high-temperature gas-solid separator and a return system), circulation is provided in the CFB boiler, the raw material particles with small particle size can rise into the upper space of the boiler along with the circulation air path for combustion, further improving the combustion efficiency.
In more detail, the rotation directions of the first screening drum 403 and the second screening drum 404 are opposite, a first spiral material guiding chute 410 is arranged on the inner surface of the first screening drum 403, a second spiral material guiding chute 411 is arranged on the inner surface of the second screening drum 404, and the rotation directions of the first spiral material guiding chute 410 and the second spiral material guiding chute 411 are opposite. In the above structure, the spiral material guiding grooves are respectively arranged in the first screening roller 403 and the second screening roller 404, and the spiral material guiding grooves drive the raw materials to transversely and gradually displace in the screening process and finally reach the discharging position.
Specifically, the feeding portion 406 includes a feeding hopper 4061, a feeding channel 4062, a feeding motor 4064 and a screw conveyor 4063, one end of the feeding channel 4062 extends into the interior of the housing 402 to be embedded with the feeding port of the first screening drum 403, the other end of the feeding channel 4062 is connected to the feeding motor 4064, the feeding hopper 4061 is located above the feeding channel 4062, and the bottom of the feeding hopper 4061 is communicated with the feeding channel 4062; the spiral conveyor 4063 is internally provided with a spiral blade, one end of a middle shaft of the spiral blade is connected with a driving shaft of the feeding motor 4064, and the other end of the middle shaft is fixedly connected with a feeding hole of the first screening roller 403. When the feeding motor 4064 rotates, the screw conveyor 4063 and the first screening drum 403 may be driven to rotate synchronously, and the screw conveyor 4063 delivers the raw material from the feeding hopper 4061 into the first screening drum 403, and the first screening drum 403 performs the particle size screening and classification.
Further, the guide roller 405 is of a conical structure, and the opening direction of the guide roller 405 faces to the discharge port side of the first screening roller 403; a plurality of connecting rods are arranged at the end, with a larger opening, of the guide roller 405, and the guide roller 405 is fixedly connected with the outer surface of the first screening roller 403 through the connecting rods; the smaller end of the guide roller 405 is engaged with the outer surface of the feeding passage 4062, and the smaller end of the guide roller 405 is free to rotate tangentially with the feeding passage 4062. The guide roller 405 is used for intensively guiding the particles screened in the first screening roller 403 to one end of the second screening roller 404, so that the raw material particles can roll in the second screening roller 404 for the maximum distance, and the screening effect is better.
In detail, the third discharging portion 409 includes a discharging hopper 4091 and a storage tank 4092, the discharging hopper 4091 is located at the bottom of the housing 402, the discharging hopper 4091 is communicated with the inner cavity of the housing 402, the storage tank 4092 is located below the discharging hopper 4091, the storage tank 4092 is communicated with the discharging hopper 4091, a negative pressure outlet 4093 is arranged at the lower part of the storage tank 4092, the negative pressure outlet 4093 is communicated with a negative pressure material conveying device, and the negative pressure material conveying device is used for conveying and separating objects in the storage tank 4092.
Further, the three-sludge pretreatment unit comprises a filtering and concentrating device 1, a drying mechanism 2, a first crushing mechanism 3 and a first metering device 5, wherein an outlet of the filtering and concentrating device 1 is connected with an inlet of the drying mechanism 2, an outlet of the drying mechanism 2 is connected with an inlet of the first crushing mechanism 3, an outlet of the first crushing mechanism 3 is connected with an inlet of a screening mechanism in the three-sludge pretreatment unit, an outlet of the screening mechanism in the three-sludge pretreatment unit is connected with an inlet of the first metering device 5, and an outlet of the first metering device 5 is connected with the stirring mechanism 10; the petroleum coke pretreatment unit comprises a second crushing mechanism 6 and a second metering device 7, an outlet of the second crushing mechanism 6 is connected with an inlet of a screening mechanism in the petroleum coke pretreatment unit, an outlet of the screening mechanism in the petroleum coke pretreatment unit is connected with an inlet of the second metering device 7, and an outlet of the second metering device 7 is connected with the stirring mechanism 10; the lime stone is including third crushing mechanism 8 and third metering device 9 in the lime stone pretreatment unit, the import of screening mechanism among the exit linkage lime stone pretreatment unit of third crushing mechanism 8, the exit linkage of screening mechanism among the lime stone pretreatment unit and third metering device 9, the exit linkage of third metering device 9 rabbling mechanism 10.
The embodiment discloses a three-sludge recovery method based on the three-sludge recovery system, which comprises the following specific steps:
firstly, sequentially filtering, concentrating and drying the three-mud through a three-mud pretreatment unit, conveying the three-mud to a first crushing mechanism 3, crushing the three-mud into three-mud particles, conveying the three-mud particles into a screening mechanism, screening the three-mud particles according with the preset particle size, and introducing the three-mud particles according with the preset particle size into a first metering device 5 through a second discharging part 408;
after the petroleum coke is crushed into stone tar particles by the second crushing mechanism 6, the stone tar particles are sent into a screening mechanism to screen out the stone tar particles which accord with the preset particle size, and the stone tar particles which accord with the preset particle size are introduced into the second metering device 7 through the second discharging part 408;
after the limestone is crushed into limestone particles by the third crushing mechanism 8, the limestone particles are fed into the screening mechanism to screen limestone particles which accord with the preset particle size, and the limestone particles which accord with the preset particle size are introduced into the third metering device 9 through the second discharging part 408;
the first metering device 5, the second metering device 7 and the third metering device 9 are respectively three mud according to volume ratio: limestone: stirring and mixing the three-mud, the limestone and the petroleum coke in a stirring mechanism 10, wherein the ratio of the petroleum coke to the petroleum coke is 1:10: 1;
and inputting the mixture into the discharging mechanism 11 for storage after stirring, namely completing the recovery of the three sludge, wherein the mixture after recovery can be introduced into a CFB boiler for full combustion.
Furthermore, in the process of screening the three sludge particles by the screening mechanism in the three sludge pretreatment units, the three sludge particles with the particle size larger than the preset particle size are conveyed to the first crushing mechanism 3 through the first discharge port of the screening mechanism for re-crushing, and the three sludge particles with the particle size smaller than the preset particle size are introduced into the storage tank 4092 through the third discharge portion 409 of the screening mechanism. In the petroleum coke particle screening process of the screening mechanism in the petroleum coke pretreatment unit, the stone tar particles with the particle size larger than the preset particle size are conveyed to the second crushing mechanism 6 through the first discharge hole of the screening mechanism to be crushed again, and the stone tar particles with the particle size smaller than the preset particle size are introduced into the storage box 4092 through the third discharge part 409 of the screening mechanism. In the process of screening limestone particles by the screening mechanism in the limestone pretreatment unit, the limestone particles larger than the preset particle size are conveyed to the third crushing mechanism 8 through the first discharge port of the screening mechanism to be crushed again, and the limestone particles smaller than the preset particle size are introduced into the storage tank 4092 through the third discharge part 409 of the screening mechanism.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A three-mud recovery system is characterized by comprising three-mud pretreatment units, a petroleum coke pretreatment unit, a limestone pretreatment unit, a stirring mechanism and a discharging mechanism, wherein the three-mud pretreatment units, the petroleum coke pretreatment unit and the limestone pretreatment unit are respectively connected with inlets of the stirring mechanism, the inlet of the stirring mechanism is connected with an outlet of the stirring mechanism, crushing mechanisms and screening mechanisms are arranged in the three-mud pretreatment units, the petroleum coke pretreatment unit and the limestone pretreatment unit, the outlet of the crushing mechanism is connected with the inlet of the screening mechanism,
the screening mechanism comprises a rack, a machine shell, a first screening roller, a second screening roller, a guide roller, a feeding part, a first discharging part, a second discharging part and a third discharging part, wherein the machine shell is fixed on the rack, the first screening roller and the second screening roller are arranged in the machine shell, the first screening roller is coaxially arranged in the second screening roller, the second screening roller is fixed along the axial direction of the first screening roller, and the second screening roller freely rotates along the tangential direction of the first screening roller; the first screening roller is provided with a feeding hole and a discharging hole, wherein the feeding part is communicated with the feeding hole of the first screening roller; the first discharging part is arranged on one side of a discharging port of the first screening roller and fixedly connected with the machine shell, the second discharging part is arranged at the lower part of the machine shell and close to one side of the discharging port of the second screening roller, and the third discharging part is arranged at the bottom of the machine shell; the guide roller is arranged between the first screening roller and the second screening roller and is fixedly connected with the first screening roller; and the surfaces of the first screening roller and the second screening roller are provided with screen holes.
2. The tertiary sludge recycling system of claim 1, wherein the first screening drum and the second screening drum rotate in opposite directions, the first screening drum is provided with a first spiral guide chute on an inner surface thereof, the second screening drum is provided with a second spiral guide chute on an inner surface thereof, and the first spiral guide chute and the second spiral guide chute have opposite rotation directions.
3. The three-mud recovery system according to claim 1, wherein the feeding part comprises a feeding hopper, a feeding channel, a feeding motor and a screw conveyor, one end of the feeding channel extends into the interior of the casing and is embedded with the feeding hole of the first screening drum, the other end of the feeding channel is connected with the feeding motor, the feeding hopper is positioned above the feeding channel, and the bottom of the feeding hopper is communicated with the feeding channel; the spiral conveyor is internally provided with spiral blades, one end of a middle shaft of each spiral blade is connected with a driving shaft of the feeding motor, and the other end of the middle shaft is fixedly connected with a feeding hole of the first screening roller.
4. The three-mud recovery system according to claim 3, wherein the guide roller is in a conical structure, and the opening direction of the guide roller faces to the discharge port side of the first screening roller; the end, with a larger opening, of the guide roller is provided with a plurality of connecting rods, and the guide roller is fixedly connected with the outer surface of the first screening roller through the connecting rods; the smaller end of the upper opening of the guide roller is matched with the outer surface of the feeding channel, and the smaller end of the upper opening of the guide roller and the feeding channel keep tangential free rotation.
5. The three-mud recovery system according to claim 1, wherein the third discharging part comprises a discharging hopper and a storage box, the discharging hopper is located at the bottom of the casing and is communicated with the inner cavity of the casing, the storage box is located below the discharging hopper, and is communicated with the discharging hopper, a negative pressure outlet is arranged at the lower part of the storage box and is communicated with a negative pressure material conveying device, and the negative pressure material conveying device is used for conveying and separating objects in the storage box.
6. The three-sludge recovery system according to claim 3, wherein the three-sludge pretreatment unit comprises a filtering concentration device, a drying mechanism, a first crushing mechanism and a first metering device, wherein an outlet of the filtering concentration device is connected with an inlet of the drying mechanism, an outlet of the drying mechanism is connected with an inlet of the first crushing mechanism, an outlet of the first crushing mechanism is connected with an inlet of a screening mechanism in the three-sludge pretreatment unit, an outlet of the screening mechanism in the three-sludge pretreatment unit is connected with an inlet of the first metering device, and an outlet of the first metering device is connected with the stirring mechanism; the petroleum coke pretreatment unit comprises a second crushing mechanism and a second metering mechanism, an outlet of the second crushing mechanism is connected with an inlet of a screening mechanism in the petroleum coke pretreatment unit, an outlet of the screening mechanism in the petroleum coke pretreatment unit is connected with an inlet of a second metering device, and an outlet of the second metering device is connected with the stirring mechanism; the lime stone is characterized in that the lime stone pretreatment unit comprises a third crushing mechanism and a third metering mechanism, an outlet of the third crushing mechanism is connected with an inlet of a screening mechanism in the lime stone pretreatment unit, an outlet of the screening mechanism in the lime stone pretreatment unit is connected with an inlet of a third metering device, and an outlet of the third metering device is connected with the stirring mechanism.
7. A three sludge recovery method based on the three sludge recovery system of any one of claims 1 to 6, characterized by comprising the steps of:
firstly, sequentially filtering, concentrating and drying the three-mud through a three-mud pretreatment unit, conveying the three-mud to a first crushing mechanism to crush the three-mud into three-mud particles, conveying the three-mud particles into a screening mechanism to screen out the three-mud particles meeting the preset particle size, and introducing the three-mud particles meeting the preset particle size into a first metering device through a second discharging part;
after the petroleum coke is broken into stone tar particles by the second breaking mechanism, the stone tar particles are sent into a screening mechanism, the stone tar particles which accord with the preset particle size are screened out, and the stone tar particles which accord with the preset particle size are introduced into a second metering device through a second discharging part;
after the limestone is crushed into limestone particles by the third crushing mechanism, the limestone particles are fed into the screening mechanism, limestone particles which accord with the preset particle size are screened out, and the limestone particles which accord with the preset particle size are introduced into the third metering device through the second discharging part;
the first metering device, the second metering device and the third metering device are respectively three mud according to the volume ratio: limestone: stirring and mixing the three-mud, the limestone and the petroleum coke in a stirring mechanism, wherein the ratio of the petroleum coke to the petroleum coke is 1:10: 1;
and inputting the mixture into the discharging mechanism for storage after stirring is finished, and finishing the recovery of the three-mud.
8. The three-sludge recycling method according to claim 7, wherein in the process of screening three sludge particles by the screening mechanism in the three-sludge pretreatment unit, the three sludge particles with the particle size larger than the preset particle size are conveyed to the first crushing mechanism through the first discharge port of the screening mechanism for re-crushing, and the three sludge particles with the particle size smaller than the preset particle size are introduced into the storage tank through the third discharge port of the screening mechanism.
9. The three-sludge recovery method according to claim 7, wherein in the process of screening petroleum coke particles by the screening mechanism in the petroleum coke pretreatment unit, the stone tar particles with the particle size larger than the preset particle size are conveyed to the second crushing mechanism through the first discharge port of the screening mechanism to be crushed again, and the stone tar particles with the particle size smaller than the preset particle size are introduced into the storage tank through the third discharge port of the screening mechanism.
10. The lime mud reclamation method as recited in claim 7, wherein, in the process of screening the limestone particles by the screening mechanism in the limestone pretreatment unit, the limestone particles with the particle size larger than the preset particle size are conveyed to the third crushing mechanism through the first discharge port of the screening mechanism to be crushed again, and the limestone particles with the particle size smaller than the preset particle size are introduced into the storage tank through the third discharge port of the screening mechanism.
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| CN113828620B (en) | 2022-05-10 |
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